using System;
using System.Collections;
using TMPro;
using UnityEngine;
using System.Collections.Generic;

public class Room : MonoBehaviour
{
    public int number;
    public GameObject numberTextObject;
    public List<GameObject> adjacentRooms;
    public bool isEntrance;
    public event EventHandler<Room> ValidRoomClicked;
    
    bool _isExplored = false;
    
    // Start is called once before the first execution of Update after the MonoBehaviour is created
    void Start() {
        
        
        if (isEntrance) {
            SetPropertiesOfEntrance();
        }
        
        TextMeshProUGUI numberText = numberTextObject.GetComponent<TextMeshProUGUI>();
        numberText.SetText(number.ToString());
    }

    public void SetRoomExplored() {
        _isExplored = true;
        gameObject.GetComponent<SpriteRenderer>().color =
            ColorUtility.AddGreyShade(gameObject.GetComponent<SpriteRenderer>().color, 0.5f);
    }

    void SetPropertiesOfEntrance() {
        gameObject.GetComponent<SpriteRenderer>().color = Color.green;
        isEntrance = true;
    }
    
    IEnumerator OnMouseDown()
    {
        if (IsValidRoomToExplore()) {
            OnValidRoomClicked();
        }
        yield return null;
    }

    protected virtual void OnValidRoomClicked() {
        ValidRoomClicked?.Invoke(this, this);
    }

    // Check if the room is valid to be explored. If so trigger the event.
    bool IsValidRoomToExplore() {
        if (_isExplored) {
            return false;
        }
        
        if (isEntrance) {
            // All entrance rooms are valid to be explored.
            return true;
        }
        else if (HasExploredAdjacentRooms()) {
            // Otherwise the room must have an adjacent room explored.
            return true;
        }
        return false;
    }

    bool HasExploredAdjacentRooms() {
        foreach (GameObject adjacentRoom in adjacentRooms) {
            if (adjacentRoom.GetComponent<Room>()._isExplored)
            {
                return true;
            }
        }
        return false;
    }
}